Flush-tank.



A. DUFTY.

FLUSH TANK.

APPLICATION men AUG.30, I916.

Patented May 22, 1917.

ARTHUR DUFTY, OF LA FAYETTE, INDIANA.

FLUSH-TANK.

Specification of Letters Patent.

Patented May as, 1917.

Application filed August 30, 1916. Serial No. 117,605.

To all whom it may concern:

Be it known that I, ARTHUR DUFTY, a citizen of the United States of America, and resident of La Fayette, Tippecanoe county, Indiana, have invented a certain new and useful Improvement in Flush- Tanks, of which the following is a specification.

My invention relates to flush-tanks of that general character in which the construction is such that the tank will periodically and automatically discharge the contents thereof.

Generally stated, the object of my invention is to provide an improved and highly eflicient flush-tank of this general construction and mode of operation.

It is also an object to provide certain details and features of construction and combinations tending to increase the general efliciency and desirability of a flush-tank of this particular character.

To the foregoing and other useful ends, my invention consists in matters hereinafter set forth and claimed.

In the accompanying drawings Figure l is a longitudinal section of a flush-tank embodying the principles of my invention.

Fig. 2 is a plan of said flush-tank.

Fig. 3 is a detail section'on line 33 in Fig. 1. e

As thus illustrated, my invention comprises a relatively small first tank A, a

somewhat larger second tank B, and a much larger or main tank C, the latter :being preferably of wood and lined with sheet-metal. The tanks A and B are preferably of sheetmetal and removably supported, one within the other, in the larger or main tank, by any suitable means, at a point near the top of said main tank and at one end thereof. The first tank A has a discharge pipe a provided with a cap 1 loosely fitted thereon, the

lower edge of said cap being supported by spider-arms, whereby the water in this tank may pass upwardly between the cap and the pipe and overflow at the upper end of the pipe, the said pipe being longer than the cap to produce a' siphoning action. The tank B is provided with a discharge pipe 6, and with a cap 2, similar to that in the first tank, whereby this second tank is also provided with a discharge siphon. The main tank is provided in the bottom thereof with a discharge pipe 0, which latter has a cap 3 loosely fitted thereover, being supported I being the largest. A water-supply fixture D, of any suitable character, is arranged in position to allow Water to drip or flow very slowly into the first tank A, so that the latter will gradually fill. The water is supplied fast enough from the fixture D to overflow the siphon of this tank A, causing this siphon to act in the proper manner to drain off the entire contents of this tank. The siphon of the tank B is larger, but it will overflow and produce a proper siphoning action when the tank A is discharged several times. The siphon for the tank C is much larger, but the volume of water descending into this tank from the tank B is suflicient to overflowthe upper end of the pipe 0 and produce a proper siphoning-0E of the water from this third or main tank. Thus a plurality of successive tanks and siphons are used to produce an automatic and'periodic discharge of the water from the main tank through the final discharge pipe E, so that the entire volume of water in the tank C is siphoned off in the required manner, notwithstanding the slow flow of water from the fixture D, in a manner that will be readily understood.

I do not limit myself to the exact form and construction shown and described.

What I claim as my invention is:

1. A flush-tank comprising a plurality of water-compartments, means for siphoning from one compartment into another, and a device to slowly supply water to the first compartment, said compartments being three in number, the first compartment being relatively small, and the second compartment being larger than said first compartment, the first compartment being disposed within the second compartment, and the second compartment being disposed within the third compartment, said means comprising a siphon for the first compartment and a siphon for the second compartment, so that the first compartment discharges a plurality of times into the second compartment before the second compartment discharges intothe third, and a siphon for the third compartment of such a size that the water in this third compartment is not discharged until after the second compartment has discharged a plurality of times. I

2. A flush-tank comprising a plurality of Water-compartments of progressively increasing size, means for siphoning from one compartment into another, and a device to slowly supply Water to the first compartment, said means comprising a plurality of siphons of increasing size and so arranged that one compartment does not discharge its contents until after the next previous or smaller compartment has discharged a plurality of times.

3. A flush-tank comprising a plurality of Water-compartments, means for siphoning from one compartment into another, and a device to slowly supply Water to the first compartment, said means comprising a plurality of siphons of different sizes, whereby the Water is discharged by a relatively small siphon into a compartment from which the Water is thereafter discharged by a relatively large siphon.

Signed by me at La Fayette, Indiana, this 18th day of August, 1916.

ARTHUR DUFTY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washingtomllfl. 

